Measure magnetic fields across three axes (X, Y, and Z) with TLI493D-A2B6 and STM32F407VGT6
For detailed magnetic field analysis or where the direction and magnitude of the magnetic field are critical
Published Mar 15, 2024
Click board™
Magneto 6 Click
Development board
Clicker 4 for STM32F4
Compiler
NECTO Studio
MCU
STM32F407VGT6
Develop systems capable of precise 3D magnetic field mapping for innovative robotics, navigation, and security applications
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Hardware Overview
How does it work?
Magneto 6 Click is based on the TLI493D-A2B6, a low-power three-dimensional Hall effect sensor with an I2C interface from Infineon. Within its small 6-pin package, the sensor directly measures a magnetic field's X, Y, and Z components. This sensor offers accurate three-dimensional sensing with extremely low power consumption and consists of three main functional units. First is the power mode control system, containing a low-power oscillator, basic biasing, accurate restart, undervoltage detection, and a fast oscillator. Second, the sensing unit that contains the HALL biasing, HALL probes with multiplexers, successive tracking ADC, and a temperature sensor. Third, the I2C interface contains the register files. Some of the main characteristics of this sensor IC are 3D magnetic flux density sensing of ±160 mT, 12-bit
data resolution for each measurement direction plus 10-bit temperature sensor, programmable flux resolution down to 65 μT, and interrupt signal to indicate a valid measurement to the microcontroller. This sensor is equipped with different modes and a digital communication interface for a good adaptation. The I2C interface can be accessed in any power mode. The interrupt function is multiplexed with the I2C SCL pin and can be used to indicate measurement completion. Using an interrupt line is optional but highly recommended to ensure proper and efficient readout of the sensor data. Magneto 6 Click is ideally suited for measuring 3-dimensional movement within a magnetic field, linear slide movement, or 360° angle rotation. The magnetic measurement values are provided in the two complements with 12-bit or
8-bit resolutions in the registers with the symbols Bx, By, and Bz. By default, the temperature measurement is activated. The temperature measurement can be disabled if it is not needed and to increase the speed of the repetition of the magnetic values. This Click board™ uses an I2C communication interface designed to operate only with a 3.3V logic level. A proper logic voltage level conversion should be performed before the Click board™ is used with MCUs with logic levels of 5V. More information about the TLI493D-A2B6 can be found in the attached datasheet. The Click board™ comes equipped with a library that contains easy-to-use functions and a usage example that may be used as a reference for the development.
Features overview
Development board
Clicker 4 for STM32F4 is a compact development board designed as a complete solution that you can use to quickly build your own gadgets with unique functionalities. Featuring an STM32F407VGT6 MCU, four mikroBUS™ sockets for Click boards™ connectivity, power management, and more, it represents a perfect solution for the rapid development of many different types of applications. At its core is an STM32F407VGT6 MCU, a powerful microcontroller by STMicroelectronics based on the high-performance
Arm® Cortex®-M4 32-bit processor core operating at up to 168 MHz frequency. It provides sufficient processing power for the most demanding tasks, allowing Clicker 4 to adapt to any specific application requirements. Besides two 1x20 pin headers, four improved mikroBUS™ sockets represent the most distinctive connectivity feature, allowing access to a huge base of Click boards™, growing on a daily basis. Each section of Clicker 4 is clearly marked, offering an intuitive and clean interface. This makes working with the
development board much simpler and, thus, faster. The usability of Clicker 4 doesn’t end with its ability to accelerate the prototyping and application development stages: it is designed as a complete solution that can be implemented directly into any project, with no additional hardware modifications required. Four mounting holes [4.2mm/0.165”] at all four corners allow simple installation by using mounting screws.
Microcontroller Overview
MCU Card / MCU
Architecture
ARM Cortex-M4
MCU Memory (KB)
10
Silicon Vendor
STMicroelectronics
Pin count
100
RAM (Bytes)
100
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Clicker 4 for STM32F4 as your development board.
Track your results in real time
Application Output
After loading the code example, pressing the "DEBUG" button builds and programs it on the selected setup.
After programming is completed, a header with buttons for various actions available in the IDE appears. By clicking the green "PLAY "button, we start reading the results achieved with Click board™.
Upon completion of programming, the Application Output tab is automatically opened, where the achieved result can be read. In case of an inability to perform the Debug function, check if a proper connection between the MCU used by the setup and the CODEGRIP programmer has been established. A detailed explanation of the CODEGRIP-board connection can be found in the CODEGRIP User Manual. Please find it in the RESOURCES section.
Software Support
Library Description
This library contains API for Magneto 6 Click driver.
Key functions:
magneto6_read_data- This function reads the measurements of the 3-axes magnetic field sensor in mT and the temperature sensor in degrees Celsiusmagneto6_read_reg- This function reads a desired number of data bytes starting from the selected register by using I2C serial interfacemagneto6_write_reg- This function writes a data byte to the selected register by using I2C serial interface
Open Source
Code example
This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.
/*!
* @file main.c
* @brief Magneto 6 Click example
*
* # Description
* This example demonstrates the use of Magneto 6 click board by reading
* the magnetic field strength from 3 axes as well as the ambient temperature measurements.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and performs the click default configuration.
*
* ## Application Task
* Reads data from the sensor and displays them on the USB UART once per second.
*
* @author Stefan Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "magneto6.h"
static magneto6_t magneto6;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
magneto6_cfg_t magneto6_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
magneto6_cfg_setup( &magneto6_cfg );
MAGNETO6_MAP_MIKROBUS( magneto6_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == magneto6_init( &magneto6, &magneto6_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( MAGNETO6_ERROR == magneto6_default_cfg ( &magneto6 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
magneto6_data_t data_res;
if ( MAGNETO6_OK == magneto6_read_data ( &magneto6, &data_res ) )
{
log_printf( &logger, " X data: %.1f mT\r\n", data_res.x_data );
log_printf( &logger, " Y data: %.1f mT\r\n", data_res.y_data );
log_printf( &logger, " Z data: %.1f mT\r\n", data_res.z_data );
log_printf( &logger, " Temperature: %.2f degC\r\n\n", data_res.temperature );
}
Delay_ms ( 1000 );
}
int main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
return 0;
}
// ------------------------------------------------------------------------ END
